Intelligent detection and early warning system for sealing performance of a boiler safety valve core

Abstract

This invention discloses an intelligent detection and early warning system for the sealing performance of a boiler safety valve core, relating to the field of safety valve technology. The invention includes a safety valve body, a data acquisition module, a control module, and an early warning module. By setting up a data acquisition module that connects to the inlet and outlet ends of the safety valve body, this invention enables continuous online detection of the valve core sealing performance without requiring shutdown and disassembly of the safety valve. This solves the technical problems of traditional offline verification methods, which require shutdown and disassembly, affecting production continuity and failing to reflect the true high-temperature and high-pressure operating conditions of the safety valve. Through real-time acquisition of inlet and outlet pressure data by a first and second pressure sensor, combined with signal processing and intelligent analysis by the control module, it identifies minute internal leaks on the valve core sealing surface. The detection sensitivity is far higher than that of manual inspection methods relying on experience. Simultaneously, it achieves continuous monitoring around the clock, reducing the intensity of manual inspections and avoiding safety hazards caused by inspection oversights.

Description

Technical Field

[0001] This invention relates to the field of safety valve technology, and in particular to an intelligent detection and early warning system for the sealing performance of a boiler safety valve core. Background Technology

[0002] Boilers are core power equipment in industries such as power, chemical, and heating. Safety valves are the most important safety accessories for boilers, installed on the boiler drum or main steam pipeline. They are used to automatically relieve pressure when the boiler is overpressured, serving as the last line of defense for safe boiler operation. The valve core is the core opening and closing component of the safety valve, and the sealing performance of its sealing surface directly determines whether the safety valve can reliably seal and open and close normally. During long-term boiler operation, the valve core sealing surface may develop defects due to media erosion, high-temperature corrosion, and particle wear, leading to a decline in sealing performance, internal leakage, or even failure to open and close normally, posing a significant safety hazard to boiler operation.

[0003] Currently, the following methods are mainly used to test the sealing performance of boiler safety valves:

[0004] Offline verification method: The safety valve is removed from the boiler and subjected to a sealing pressure test on a dedicated test bench. Although this method is accurate, it requires shutdown and disassembly, affecting production continuity, and cannot reflect the true sealing condition of the safety valve under actual high temperature and high pressure conditions.

[0005] Manual inspection method: This method relies on operators touching the valve body with a listening rod and judging whether there is a leak by experience. This method is highly subjective, insensitive to minor leaks, and has a low inspection frequency, making continuous monitoring impossible.

[0006] Online calibration method: This method uses a hydraulic or pneumatic auxiliary device to apply a lifting force to the valve stem and measures the set pressure of the safety valve. This method is mainly for calibrating the set pressure and lacks the ability to monitor minute leaks at the valve core sealing surface in real time.

[0007] To address these issues, we provide an intelligent detection and early warning system for the sealing performance of boiler safety valve cores. Summary of the Invention

[0008] The present invention aims to at least partially solve one of the technical problems in the related art.

[0009] To achieve the above objectives, this invention proposes an intelligent detection and early warning system for the sealing performance of a boiler safety valve core, comprising a safety valve body, a data acquisition module, a control module, and an early warning module; The data acquisition module includes a first connecting pipe and a second connecting pipe. The first connecting pipe is connected to the air inlet end of the safety valve body, and the second connecting pipe is connected to the air outlet end of the safety valve body. A first pressure sensor is provided on the first connecting pipe, and a servo motor is provided on the second connecting pipe. A valve stem is fixedly connected to the output end of the servo motor. A guide hole for the valve stem to pass through is opened at the top of the second connecting pipe. The valve stem passes through the inner cavity of the second connecting pipe and is fixedly connected to a valve plate. A second pressure sensor is provided on the side wall of the second connecting pipe between the valve plate and the safety valve body. The input terminal of the control module is electrically connected to the first pressure sensor and the second pressure sensor, and the servo motor and the early warning module are electrically connected to the output terminal of the control module.

[0010] This invention, by setting up data acquisition modules at the inlet and outlet ends of the safety valve body, enables continuous online detection of the valve core sealing performance without shutting down the system to disassemble the safety valve. This solves the technical problems of traditional offline verification methods, which require shutdown and disassembly, affecting production continuity and failing to reflect the true high-temperature and high-pressure operating conditions of the safety valve. By collecting pressure data at the inlet and outlet ends in real time through first and second pressure sensors, and combining this with signal processing and intelligent analysis by the control module, it can identify minute internal leaks on the valve core sealing surface. The detection sensitivity is far higher than that of manual inspection methods that rely on experience. At the same time, it enables uninterrupted monitoring around the clock, reduces the intensity of manual inspection, avoids safety hazards caused by inspection oversights, and ensures the continuity and safety of boiler operation.

[0011] Optionally, the control module includes a housing, with a circuit board fixedly connected to the inner cavity of the housing. A signal amplifier, a filter, an A / D converter, and a microprocessor are fixedly connected to the surface of the circuit board, and a storage module, a positioning module, and a networking module are fixedly connected to the back of the circuit board. A battery electrically connected to the circuit board is fixedly installed in the inner cavity of the housing at the top of the circuit board; A maintenance plate is detachably provided on one side of the housing by means of bolts; A connecting frame is fixedly connected to one side of the top of the housing and the top of the side surface, and the other side of the connecting frame is fixedly connected to the surface of the first connecting pipe and the second connecting pipe, respectively.

[0012] Furthermore, the warning module includes a speaker fixedly connected to the front end of the housing cavity, and a light alarm is fixedly connected to one side of the housing.

[0013] Furthermore, the bottom surface of the inspection plate is provided with a sound hole for use with a speaker.

[0014] Furthermore, the input terminal of the signal amplifier is unidirectionally electrically connected to the output terminals of the first and second pressure sensors; the output terminal of the signal amplifier is unidirectionally electrically connected to the input terminal of the filter; the output terminal of the filter is unidirectionally electrically connected to the input terminal of the A / D converter; the output terminal of the A / D converter is unidirectionally electrically connected to the input terminal of the microprocessor; the microprocessor is bidirectionally electrically connected to the storage module, the positioning module, and the networking module; and the output terminal of the microprocessor is unidirectionally electrically connected to the input terminals of the servo motor, the speaker, and the light alarm, respectively.

[0015] Furthermore, a high-temperature resistant sealing ring is fixedly sleeved on the outer periphery of the valve plate, and an annular sealing step adapted to the valve plate is integrally formed in the inner cavity of the second connecting pipe. The outer ring of the high-temperature resistant sealing ring is interference-fitted with the inner wall of the annular sealing step.

[0016] Furthermore, annular positioning grooves are provided on the mating end face of the first connecting pipe and the air inlet end of the safety valve body, and on the mating end face of the second connecting pipe and the air outlet end of the safety valve body. A metal spiral wound sealing gasket is embedded in the annular positioning groove.

[0017] Furthermore, the inner wall of the guide hole is sequentially fitted with a self-lubricating guide bushing and a combined dynamic seal stuffing box from top to bottom. The inner wall of the self-lubricating guide bushing slides against the outer circumferential surface of the valve stem, and the inner ring of the combined dynamic seal stuffing box is interference-fitted with the outer circumferential surface of the valve stem.

[0018] Furthermore, buffer damping joints are provided at the connection points between the first pressure sensor and the first connecting pipe, and between the second pressure sensor and the second connecting pipe.

[0019] Furthermore, the circuit board is fixedly connected to the inner wall of the housing by bolts.

[0020] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.

[0021] The present invention has the following beneficial effects: 1. This invention, by setting up data acquisition modules at the inlet and outlet ends of the safety valve body, enables continuous online detection of the valve core sealing performance without shutting down the machine to disassemble the safety valve. This solves the technical problems of traditional offline verification methods, which require shutdown and disassembly, affecting production continuity and failing to reflect the true high-temperature and high-pressure operating conditions of the safety valve. By collecting pressure data at the inlet and outlet ends in real time through the first and second pressure sensors, and combining the signal processing and intelligent analysis of the control module, it can identify minute internal leaks on the valve core sealing surface. The detection sensitivity is far higher than that of manual inspection methods that rely on experience. At the same time, it can achieve uninterrupted monitoring around the clock, reduce the intensity of manual inspection, avoid safety hazards caused by inspection oversights, and ensure the continuity and safety of boiler operation.

[0022] 2. This invention achieves full-process intelligent and automated testing of the valve core sealing performance of safety valves through the coordinated operation of the control module and the early warning module. It solves the technical problems of traditional testing methods, such as strong subjectivity, low level of intelligence, and inability to achieve early warning and remote control. The system ensures the accuracy of the test data through signal amplification, filtering, and analog-to-digital conversion. The microprocessor can automatically complete the leakage judgment and level classification, and simultaneously trigger on-site audible and visual warnings. At the same time, the network module enables remote uploading of test data and warning information. With the help of the positioning module, faulty equipment can be quickly located, facilitating timely handling by maintenance personnel, avoiding safety accidents caused by valve core sealing failure, and improving the intelligent level of boiler safety valve operation and maintenance management. Attached Figure Description

[0023] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the following description of the embodiments taken in conjunction with the accompanying drawings, wherein: Figure 1 A three-dimensional diagram of an intelligent detection and early warning system for the sealing performance of a boiler safety valve core. Figure 2 A rear view schematic diagram of an intelligent detection and early warning system for the sealing performance of a boiler safety valve core. Figure 3 A cross-sectional schematic diagram of an intelligent detection and early warning system for the sealing performance of a boiler safety valve core. Figure 4 This is a front exploded view of the internal connection structure of the shell in an intelligent detection and early warning system for the sealing performance of a boiler safety valve core. Figure 5 An exploded rear view diagram of the internal connection structure of a boiler safety valve core sealing performance intelligent detection and early warning system. Figure 6 This is a schematic diagram of the system principle of an intelligent detection and early warning system for the sealing performance of a boiler safety valve core.

[0024] Explanation of reference numerals in the attached figures: 1. Safety valve body; 2. Data acquisition module; 21. First connecting pipe; 22. First pressure sensor; 23. Second connecting pipe; 24. Servo motor; 25. Valve plate; 26. Second pressure sensor; 3. Control module; 31. Housing; 32. Circuit board; 33. Signal amplifier; 34. Filter; 35. A / D converter; 36. Microprocessor; 37. Storage module; 38. Positioning module; 39. Networking module; 310. Inspection board; 311. Battery; 312. Connecting bracket; 4. Early warning module; 41. Speaker; 42. Light alarm. Detailed Implementation

[0025] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0026] This invention proposes an intelligent detection and early warning system for the sealing performance of boiler safety valve cores, as described below. Figures 1 to 6 Please provide a detailed explanation.

[0027] A smart detection and early warning system for the sealing performance of a boiler safety valve core includes a safety valve body 1, a data acquisition module 2, a control module 3, and an early warning module 4. The data acquisition module 2 includes a first connecting pipe 21 and a second connecting pipe 23. The first connecting pipe 21 is connected to the air inlet end of the safety valve body 1, and the second connecting pipe 23 is connected to the air outlet end of the safety valve body 1. A first pressure sensor 22 is provided on the first connecting pipe 21, and a servo motor 24 is provided on the second connecting pipe 23. A valve stem is fixedly connected to the output end of the servo motor 24. A guide hole for the valve stem to pass through is opened at the top of the second connecting pipe 23. The valve stem passes through the inner cavity of the second connecting pipe 23 and is fixedly connected to a valve plate 25. A second pressure sensor 26 is provided on the side wall of the second connecting pipe 23 between the valve plate 25 and the safety valve body 1. The input terminal of the control module 3 is electrically connected to the first pressure sensor 22 and the second pressure sensor 26, and the servo motor and the early warning module 4 are electrically connected to the output terminal of the control module 3.

[0028] This invention, by setting up a data acquisition module 2 connecting the inlet and outlet ends of the safety valve body 1, enables continuous online detection of the valve core sealing performance without shutting down the machine to disassemble the safety valve. This solves the technical problems of traditional offline verification methods, which require machine shutdown and disassembly, affecting production continuity and failing to reflect the true high-temperature and high-pressure operating conditions of the safety valve. Through the real-time acquisition of pressure data at the inlet and outlet ends by the first pressure sensor 22 and the second pressure sensor 26, combined with the signal processing and intelligent analysis of the control module 3, it identifies minute internal leaks on the valve core sealing surface. The detection sensitivity is far higher than that of manual inspection methods that rely on experience. At the same time, it achieves uninterrupted monitoring around the clock, reduces the intensity of manual inspection, avoids safety hazards caused by inspection oversights, and ensures the continuity and safety of boiler operation.

[0029] In some embodiments, the control module 3 includes a housing 31, a circuit board 32 is fixedly connected to the inner cavity of the housing 31, a signal amplifier 33, a filter 34, an A / D converter and a microprocessor 36 are fixedly connected to the surface of the circuit board 32 respectively, and a storage module 37, a positioning module 38 and a networking module 39 are fixedly connected to the back of the circuit board 32 respectively. A battery 311, which is electrically connected to the circuit board 32, is fixedly installed in the inner cavity of the housing 31 at the top of the circuit board 32. A maintenance plate 310 is detachably provided on one side of the housing 31 by bolts; A connecting frame 312 is fixedly connected to one side of the top of the housing 31 and the top of the side surface, and the other side of the connecting frame 312 is fixedly connected to the surface of the first connecting pipe 21 and the second connecting pipe 23 respectively.

[0030] Understandably, by integrating the signal amplifier 33, filter 34, A / D converter 35, and microprocessor 36 onto the surface of the same circuit board 32, and integrating the storage module 37, positioning module 38, and networking module 39 onto the back of the same circuit board 32, a high-density integrated layout of the signal processing unit, data processing unit, and communication positioning unit is achieved. This effectively shortens the signal trace length between components, reduces the probability of electromagnetic interference coupling on the signal transmission path, and improves the integrity of signal transmission and the stability of system operation. The connecting brackets 312 on the top and sides of the housing 31 directly fix the housing 31 to the first connecting pipe 21 and the second connecting pipe 23, forming a rigid integrated structure between the control module 3 and the data acquisition module 2. This avoids the problems of excessively long connecting cables and loose interfaces caused by scattered installation, while shortening the transmission distance of the pressure sensor analog signal to the signal amplifier 33, reducing crosstalk of strong electromagnetic noise in the industrial environment to weak pressure signals, and improving the signal-to-noise ratio of signal acquisition. The battery 311 installed at the top of the inner cavity of the housing 31 can continuously supply power to the circuit board 32 during brief power outages at the boiler site, maintaining uninterrupted system operation and avoiding monitoring blind spots caused by power outages. A maintenance plate 310 is detachably installed on one side of the housing 31 via bolts, facilitating quick opening during routine inspections to visually inspect and troubleshoot the internal circuit board 32 and its components, reducing maintenance difficulty and downtime.

[0031] In some embodiments, the warning module 4 includes a speaker 41 fixedly connected to the front end of the inner cavity of the housing 31, and a light alarm 42 fixedly connected to one side of the housing 31. Positioning the speaker 41 at the front end of the inner cavity of the housing 31 allows sound waves to radiate directly outward through the front wall of the housing 31, resulting in a short propagation path and minimal energy loss. Combined with the light alarm 42 positioned on one side of the housing 31 emitting a flashing light signal to the external space, a dual sound and light warning mode is formed. In the complex industrial environment of a boiler room with high noise levels and multiple operating devices, a single auditory or visual warning method may be ignored by operators due to environmental interference. Synchronized sound and light alarms ensure that warning information is promptly perceived by on-site personnel. Even when the operator is not facing the equipment, the voice warning emitted by the speaker 41 can still attract attention, significantly improving the reliability of warning information transmission and the timeliness of on-site response.

[0032] Through the coordinated operation of control module 3 and early warning module 4, the entire process of safety valve core sealing performance testing is made intelligent and automated. This solves the technical problems of traditional testing methods, such as high subjectivity, low level of intelligence, and inability to achieve early warning and remote control. The system ensures the accuracy of test data through signal amplification, filtering, and analog-to-digital conversion. Microprocessor 36 can automatically complete leakage judgment and level classification, and simultaneously trigger on-site audible and visual warnings. At the same time, the network module 39 enables remote uploading of test data and warning information. With the help of positioning module 38, faulty equipment can be quickly located, facilitating timely handling by maintenance personnel, avoiding safety accidents caused by valve core sealing failure, and improving the level of intelligence in boiler safety valve operation and maintenance management.

[0033] In some embodiments, the bottom surface of the inspection plate 310 is provided with a sound hole for use with the speaker 41. By creating a sound hole at the bottom surface of the inspection plate 310 corresponding to the position of the speaker 41, a low-impedance channel for sound wave propagation is formed, allowing the warning sound emitted by the speaker 41 to penetrate the housing 31 and propagate outward with minimal attenuation, ensuring the effective coverage range of the warning volume. The sound hole, located at the bottom of the inspection plate 310, ensures effective sound wave propagation while preventing dust and particulate matter floating in the boiler room from directly falling onto the diaphragm surface of the speaker 41, thus providing a certain degree of protection and extending the service life of the speaker 41.

[0034] In some embodiments, the input terminal of the signal amplifier 33 is unidirectionally electrically connected to the output terminals of the first pressure sensor 22 and the second pressure sensor 26; the output terminal of the signal amplifier 33 is unidirectionally electrically connected to the input terminal of the filter 34; the output terminal of the filter 34 is unidirectionally electrically connected to the input terminal of the A / D converter; the output terminal of the A / D converter is unidirectionally electrically connected to the input terminal of the microprocessor 36; the microprocessor 36 is bidirectionally electrically connected to the storage module 37, the positioning module 38, and the networking module 39; and the output terminal of the microprocessor 36 is unidirectionally electrically connected to the input terminals of the servo motor 24, the speaker 41, and the light alarm 42, respectively.

[0035] Understandably, by constructing a unidirectional, step-by-step signal processing link of "pressure sensor (including first pressure sensor 22 and second pressure sensor 26) → signal amplifier 33 → filter 34 → A / D converter 35 → microprocessor 36," an orderly flow of pressure analog signals from front-end acquisition to back-end digital processing is achieved. The signal amplifier 33 amplifies the weak millivolt-level pressure signals output by the first and second pressure sensors 22, increasing the signal amplitude to a range that subsequent circuits can recognize and process. The filter 34 filters out superimposed industrial electromagnetic noise and high-frequency clutter in the amplified signal, improving signal smoothness and stability. The A / D converter 35 converts the processed analog signal into a digital signal for quantization by the microprocessor 36. The clear division of labor and unidirectional transmission at each stage avoid signal backflow interference, ensuring the accuracy and consistency of the detection data. The microprocessor 36 is bidirectionally electrically connected to the storage module 37, allowing it to write real-time detection data to the storage module 37 for historical record storage, and also to read preset sealing performance judgment thresholds and leakage level classification standards from the storage module 37 as needed, enabling automatic determination of the valve core sealing status. The microprocessor 36 is also bidirectionally electrically connected to the positioning module 38, enabling real-time acquisition of equipment installation location information, facilitating accurate identification of abnormal equipment locations when multiple boiler safety valves are deployed simultaneously. Furthermore, the microprocessor 36 is bidirectionally electrically connected to the networking module 39, supporting the remote uploading of detection data and early warning information to the operation and maintenance center platform via industrial Ethernet or wireless network, and simultaneously receiving remotely issued parameter configuration commands, achieving remote centralized monitoring and diagnosis. The output of the microprocessor 36 is unidirectionally electrically connected to the servo motor 24, the speaker 41, and the light alarm 42. When it is determined that there is internal leakage in the valve core, the microprocessor 36 simultaneously sends a closing command to the servo motor 24 to drive the valve plate 25 to close and block the leakage from spreading, sends a voice warning command to the speaker 41, and sends a flashing command to the light alarm 42. The three work together to form an automated closed-loop response of detection-judgment-isolation-warning, which significantly improves the system's emergency response speed and active safety protection capability to valve core sealing failure.

[0036] In some embodiments, a high-temperature resistant sealing ring is fixedly sleeved on the outer periphery of the valve plate 25, and an annular sealing step adapted to the valve plate 25 is integrally formed in the inner cavity of the second connecting pipe 23. The outer ring of the high-temperature resistant sealing ring is interference-fitted with the inner wall of the annular sealing step. When the servo motor 24 drives the valve plate 25 to move downward to the closed position, the high-temperature resistant sealing ring sleeved on the outer periphery of the valve plate 25 is pressed into the annular sealing step in the inner cavity of the second connecting pipe 23 synchronously with the valve plate 25. Under the action of the interference fit, it is deformed by pressure and forms a circumferentially uniform surface contact seal with the inner wall of the annular sealing step. This sealing structure can effectively block the leakage of high-temperature and high-pressure medium from the circumferential gap of the valve plate 25 to the detection chamber where the second pressure sensor 26 is located, ensuring reliable cut-off of the channel of the second connecting pipe 23 in the detection mode. This allows the outlet pressure data collected by the second pressure sensor 26 to truly reflect the leakage situation of the valve core sealing surface in the closed state, avoiding misjudgment caused by the second pressure sensor 26 detecting a false pressure rise signal due to the valve plate 25's own poor sealing, and ensuring the authenticity and reliability of the leakage detection results.

[0037] In some embodiments, annular positioning grooves are provided on the mating end face of the first connecting pipe 21 and the air inlet end of the safety valve body 1, and on the mating end face of the second connecting pipe 23 and the air outlet end of the safety valve body 1. A metal spiral wound sealing gasket is embedded in the annular positioning groove.

[0038] Specifically, during installation, the annular positioning groove provides a radial positioning reference for the mating end faces, enabling the first connecting pipe 21, the second connecting pipe 23, and the air inlet and outlet ends of the safety valve body 1 to be quickly aligned before bolt tightening, reducing installation deviations and improving assembly efficiency. After the metal spiral wound sealing gasket is embedded in the annular positioning groove, it is compressed and deformed under the action of bolt pre-tightening force. Its internal metal spiral wound skeleton and flexible graphite filling layer tightly fill the microscopic uneven gaps of the mating end faces, forming a multi-layered labyrinth sealing path. Compared with ordinary flat gaskets, the metal spiral wound sealing gasket combines the high-temperature strength of metal materials with the good compensating properties of flexible materials. It can still maintain a stable sealing specific pressure under the temperature alternation and pressure fluctuations caused by frequent boiler start-ups and shutdowns, effectively preventing the medium from leaking out from the mating flange face, ensuring the long-term sealing reliability of the connection interface and the safety of equipment operation.

[0039] In some embodiments, a self-lubricating guide bushing and a combined dynamic seal stuffing box are sequentially embedded in the inner wall of the guide hole from top to bottom. The inner wall of the self-lubricating guide bushing slides against the outer peripheral surface of the valve stem, and the inner ring of the combined dynamic seal stuffing box is interference-fitted with the outer peripheral surface of the valve stem.

[0040] The self-lubricating guide bushing is made of a composite material containing solid lubricant. Its inner wall slides against the outer circumference of the valve stem, providing a low-friction coefficient guide support for the reciprocating movement of the valve stem. This ensures smooth valve stem operation without the need for external lubricating grease and prevents valve stem jamming caused by carbonization and coking of lubricating grease at high temperatures. The inner ring of the combined dynamic seal stuffing box is interference-fitted with the outer circumference of the valve stem, forming a multi-stage sealing barrier along the valve stem axis. During valve stem movement, this multi-stage sealing barrier sequentially attenuates the medium pressure gradient, effectively preventing the medium in the second connecting pipe 23 from leaking upwards into the external environment through the gap between the valve stem and the guide hole. This improves the redundancy reliability and long-term service performance of the dynamic seal structure.

[0041] In some embodiments, buffer damping joints are provided at the connection points of the first pressure sensor 22 and the first connecting pipe 21, and the second pressure sensor 26 and the second connecting pipe 23. The buffer damping joint has a damping channel or buffer cavity structure inside. When the pressure of the medium in the boiler system pulsates, the pressure wave is subjected to a throttling damping effect through the damping channel, and the pulsation amplitude is attenuated, resulting in a smoother pressure change transmitted to the pressure sensor diaphragm. This structure can effectively alleviate the mechanical stress damage to the sensor diaphragm caused by instantaneous pressure shocks generated by high-temperature and high-pressure media under conditions such as boiler load changes and feedwater pump start-up and shutdown, preventing sensor damage or zero-point drift due to overload impact, and extending the sensor's service life and measurement accuracy retention period. Simultaneously, the buffer damping joint has a low-pass filtering effect on high-frequency fluctuations in medium pressure, reducing random fluctuation components in the pressure signal, improving the stability and repeatability of pressure acquisition data, and providing a smoother and more accurate basis for pressure difference calculation for the microprocessor 36, thereby improving the accuracy and reliability of leak detection.

[0042] In some embodiments, the circuit board 32 is fixedly connected to the inner wall of the housing 31 by bolts. Compared to fasteners or adhesives, bolted connections provide a stable and reliable mechanical clamping force, creating a rigid connection between the circuit board 32 and the housing 31. During boiler operation, the operation of the furnace body, pipes, and auxiliary equipment generates continuous low-frequency mechanical vibrations. Bolted fixing effectively suppresses the micro-displacement of the circuit board 32 relative to the housing 31, preventing fatigue cracks or loosening and detachment of the solder joints of components mounted on the upper surface of the circuit board 32 due to long-term vibration, and preventing intermittent faults in the electrical connections between modules due to poor contact.

[0043] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0044] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0045] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0046] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0047] In this invention, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0048] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A smart detection and early warning system for the sealing performance of a boiler safety valve core, characterized in that, It includes the safety valve body, data acquisition module, control module, and early warning module; The data acquisition module includes a first connecting pipe and a second connecting pipe. The first connecting pipe is connected to the air inlet end of the safety valve body, and the second connecting pipe is connected to the air outlet end of the safety valve body. A first pressure sensor is provided on the first connecting pipe, and a servo motor is provided on the second connecting pipe. A valve stem is fixedly connected to the output end of the servo motor. A guide hole for the valve stem to pass through is opened at the top of the second connecting pipe. The valve stem passes through the inner cavity of the second connecting pipe and is fixedly connected to a valve plate. A second pressure sensor is provided on the side wall of the second connecting pipe between the valve plate and the safety valve body. The input terminal of the control module is electrically connected to the first pressure sensor and the second pressure sensor, and the servo motor and the early warning module are electrically connected to the output terminal of the control module.

2. The intelligent detection and early warning system for the sealing performance of a boiler safety valve core as described in claim 1, characterized in that, The control module includes a housing, and a circuit board is fixedly connected to the inner cavity of the housing. A signal amplifier, a filter, an A / D converter, and a microprocessor are fixedly connected to the surface of the circuit board, and a storage module, a positioning module, and a networking module are fixedly connected to the back of the circuit board. A battery electrically connected to the circuit board is fixedly installed in the inner cavity of the housing at the top of the circuit board; A maintenance plate is detachably provided on one side of the housing by means of bolts; A connecting frame is fixedly connected to one side of the top of the housing and the top of the side surface, and the other side of the connecting frame is fixedly connected to the surface of the first connecting pipe and the second connecting pipe, respectively.

3. The intelligent detection and early warning system for the sealing performance of a boiler safety valve core as described in claim 2, characterized in that, The warning module includes a speaker fixedly connected to the front end of the housing cavity, and a light alarm fixedly connected to one side of the housing.

4. The intelligent detection and early warning system for the sealing performance of a boiler safety valve core as described in claim 3, characterized in that, The bottom surface of the inspection plate has a sound hole for use with a loudspeaker.

5. The intelligent detection and early warning system for the sealing performance of a boiler safety valve core as described in claim 2, characterized in that, The input terminal of the signal amplifier is unidirectionally electrically connected to the output terminals of the first and second pressure sensors. The output terminal of the signal amplifier is unidirectionally electrically connected to the input terminal of the filter. The output terminal of the filter is unidirectionally electrically connected to the input terminal of the A / D converter. The output terminal of the A / D converter is unidirectionally electrically connected to the input terminal of the microprocessor. The microprocessor is bidirectionally electrically connected to the storage module, the positioning module, and the networking module. The output terminal of the microprocessor is unidirectionally electrically connected to the input terminals of the servo motor, the speaker, and the light alarm, respectively.

6. The intelligent detection and early warning system for the sealing performance of a boiler safety valve core as described in claim 1, characterized in that, The valve plate is fixedly fitted with a high-temperature resistant sealing ring on its outer periphery. The inner cavity of the second connecting pipe is integrally formed with an annular sealing step that matches the valve plate. The outer ring of the high-temperature resistant sealing ring is interference-fitted with the inner wall of the annular sealing step.

7. The intelligent detection and early warning system for the sealing performance of a boiler safety valve core as described in claim 1, characterized in that, The first connecting pipe and the air inlet end of the safety valve body, and the second connecting pipe and the air outlet end of the safety valve body, are both provided with annular positioning grooves, and metal spiral wound sealing gaskets are embedded in the annular positioning grooves.

8. The intelligent detection and early warning system for the sealing performance of a boiler safety valve core as described in claim 1, characterized in that, The inner wall of the guide hole is sequentially fitted with a self-lubricating guide bushing and a combined dynamic seal stuffing box from top to bottom. The inner wall of the self-lubricating guide bushing slides against the outer circumferential surface of the valve stem, and the inner ring of the combined dynamic seal stuffing box is interference-fitted with the outer circumferential surface of the valve stem.

9. The intelligent detection and early warning system for the sealing performance of a boiler safety valve core as described in claim 1, characterized in that, Buffer damping joints are provided at the connection points between the first pressure sensor and the first connecting pipe, and between the second pressure sensor and the second connecting pipe.

10. The intelligent detection and early warning system for the sealing performance of a boiler safety valve core as described in claim 2, characterized in that, The circuit board is fixedly connected to the inner wall of the housing by bolts.

Images